Die for making cotters.



H. H. SHELTON.

DIE FOR MAKING COTTERS.

APPLICATION FILED AUG. 3. 1914.

Patented Aug. 24, 1915.

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p eatioiiif Patent.

Patented Aug. 2a, 1915.

Application filed August 3, 1914. Serial No. 854,769.

To all whom it may concern Be it known that I, HOWARD H. SHELTON, acitizen of the United States, residing at Akron, in the county of Summitand State of Ohio, have invented new and useful Improvements in Dies forMaking Cotters, of which the following is a specification.

This invention relates to improvementsin dies for forming rounded orconoidallyended blanks from which cotters or spring keys are made, andthe object of the inven tion is to fashion dies to sever a continuousstrip of Wire into blanks for making cotters, so that during thesevering of the blanks from the continuous strip of wire they will beprovided with tapered, rounded or conoidally-formed ends whereby whensaid blanks are fashioned into cotters the shank ends of the cotter willbe correspondingly formed to obviate the rounding or tapering of theends by a separate operation.

With the foregoing and other objects in view, the invention consists inthe novel construction, combination and arrangement of partsconstituting the invention to be here inafter specifically described andillustrated in the accompanying drawings which form a part hereofwherein is shown the preferred embodiment of the invention, but it is tobe understood that changes, variations and modifications can be resortedto which come within the scope of the matter hereinafter claimed.

In the drawings in which similar reference numerals indicate like partsin the different figures, Figure 1, is a perspective view of a die and aco-acting punching shear with a strip of wire in the die just previousto the shearing operation; Fig. 2, is a view similar to Fig. 1 after theblank has been severed from the continuous wire and with the ends of thewire and blank rounded; and, Fig. 3,is a view in side elevation of acotter manufactured from a blank such as is showninFig. 2.

Referring to the drawings in detail, the

reference numeral 1 denotes a fixed or lowerdie which is usually mountedin a seat in a suitable machine equipped with mechanism for verticallyreciprocating a movable or upper die 2 but as the mechanism foroperating the movable die 2 is unimportant tothis invention it isomitted. The lower die 1 is provided with a longitudinally extendinggroove 3 so fashioned in cross section as to properly receive the wirefrom which the blanks are to be formed, as in this illustration it isapproximately semi-circular in form. Intersecting the groove 3 is arecess 4: preferably with approximately vertical side walls and of aproper size to freely receive the lower working end of'the movable die2. Adjacent to the side walls of the recess 4 both ends of the groove 3are inwardly tapered or curved at 5, as shown in the drawings, therebyreducing the openings at the groove ends between the groove 3 and therecess i. In practice, the end of a continuous wire 6 is shiftedlongitudinally along the groove 3 so as to extend across the recess 4:after which the movable die 2 is lowered, severing the projecting end ofthe wire 6 into a blank 7 It will be noted that the ends of the groove 3on both sides of the recess 4; are rounded so. that the severed advancedend 8 of the continuous wire and the blank end are simultaneouslyrounded and after another section of the continuous wire is advanced andsevered both ends of the blanks produced are given a tapered rounded orconoidally formed contour after which the blank is shaped into the formof a cotter 9 as shown in Fig. 3. Of course the tapering or curving ofthe shank end 10 of the cotter is for the purpose of permitting a moreeasy insertion of the cotter in an opening in use.

I claim 1. Mechanism for forming cotter blanks having rounded, taperedor conoidally formed ends comprising a die having a wirereceiving grooveextending in one face thereof, a recess intersecting said groove, theends of the groove adjacent to the intersecting recess being rounded,tapered contracted or conoidally fashioned, and a shearing punch adaptedto pass through said recess for simultaneously severing a blank from acontinuous wire and simultaneously rounding or tapering the ends of thewire.

2. Mechanism for forming cotter blanks having rounded, tapered orconoidallyformed ends comprising a-die having a wirereceiving grooveextending in one face, and further provided with a recess intersectingsaid groove the groove adjacent to the sides In testimony whereof I havehereunto set of the recess tapering inwardly toward the my hand inpresence of two subscribing wit- 10 recess and united therewith bycontracted, nesses. V

openings and a shearing punch arranged to ARD H; S

" move through said recess for severing a blank from a wire andsimultaneously fash- Witnesses: I ioning the ends of both wire and blankto A. L. MOCLINTOOK, correspond with the contour of said groove. C. E.HUMPHREY.

five cents each, by addressing the Commissioner of Patents,

Copies of this patent may be obtained for 7 v I Washington, I). G.

